Online purchase (cont’d). Refer to Exercise 10.43. The research also reports the characteristics of the 100 respondents based on the electronic media used (PC/laptop, smartphone/tablet) and purchase frequency (2 times, 3–5 times, 7 5 times). The results show that 69 students used smartphones/tablets to make their purchase. Regarding the purchase frequency, 45 students purchased online more than 5 times, and only 20 purchased exactly twice. Out of those who purchased exactly twice, 6 used a PC/laptop. Of the smartphone/tablet users, 24 purchased online 3–5 times while of the PC/laptop users, 31 students purchased more than 5 times.

a. Consider the two categorical variables, Electronic Media and Purchase Frequency, and form a 2 * 2 contingency table for these variables.

b. Compute the expected cell counts for the contingency table in part

a. c. Compute the x2 for a test of independence.

d. At a = .05, what inference can you make about the two variables, Electronic Media and Purchase Frequency?

e. Create a bar chart that will visually support your conclusion in part d.